I picked this up at Costco purely for the cover, but once I saw the inside map, I was sold. Leviathan is an alternate history on the brink of World War I. But the world poised for war is divided between the Clankers (Germany, Austria-Hungary and the Ottomans) and the Darwinists (Great Britain and Her allies). The Clankers use machines (war walkers and land battleships) and the Darwinists use bio-engineered super beasts.THe Leviathan mentioned in the title is a giant whale/blimp. Pretty cool, huh? It's a book written for teens, but so far it's action-packed and I love the setting. I smell a steampunk battle on thew horizon.